South Korea (full name, The Republic of Korea) covers an area of approximately 99,300 sq km with a terrain consisting of mostly hills and mountains with wide coastal plains in the west and south. Korea borders North Korea, and has 2,413km of coastline. The country is divided into 9 provinces (Cheju-do, Cholla-bukto, Cholla-namdo, Ch'ungch'ong-bukto, Ch'ungch'ong-namdo, Kangwon-do, Kyonggi-do, Kyongsang-bukto and Kyongsang-namdo) and 7 metropolitan cities (Inch'on-gwangyoksi, Kwangju-gwangyoksi, Pusan-gwangyoksi, Soul-t'ukpyolsi, Taegu-gwangyoksi, Taejon-gwangyoksi and Ulsan-gwangyoksi). Seoul is the capital, with a time difference of 9 hours ahead of GMT. The currency is the won, and exports include electronic products, machinery and transport equipment. The population of approximately 48,500,000 people comprises a largely homogeneous ethnic makeup. The primary language is Korean, and the predominant religion is Buddhism and Christianity.